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Achromatic Waveplate
Achromatic waveplate is similar to zero order waveplate except that the two plates are made from different birefringent crystals. Since the dispersion of the birefringence of two materials is different, it is possible to specify the retardation values at a broad wavelength range. So, the retardation will be less sensitive to wavelength change. In other words, it can be used at a broadband wavelength range.
 
  • Epoxy Cemented or Air Spaced available
  • Very Broad Bandwidth
  • Custom size available
  • RoHS Compliant
Specifications
 
Material Birefringent crystals
Dimension Tolerance +0.0/-0.2mm
Wavefront Distortion λ/4@632.8nm (for air spaced type)
Retardation Tolerance λ/100
Parallelism <10 arc second (for cemented type)
Surface Quality 40/20 scratch and dig
Clear Aperture >90% central area
Standard Wave quarter-wave(λ/4), half-wave(λ/2)
Standard Wavelength

450-650nm
550-750nm
650-1100nm
900-2100nm

Coating Uncoated for standard, AR coating available

 

λ/2 Part No.

λ/4 Part No.

Diameter(mm)

Type

WA210

WA410

10.0

Cemented

WA215

WA415

15.0

WA225

WA425

25.4

WA210

WA410*

10.0

Air Spaced

WA215

WA415*

15.0

WA225

WA425*

25.4

*Not suitable for 450-650nm and 550-750nm

 

 

 

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